  function formatTime(date){
  const year =date.getFullYear()
  const month=date.getMonth()+1
  const day=date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return [year,month,day].map(formatNumber).join('-')+' '+[hour,minute,second].map(formatNumber).join(':')
}
const formatNumber=n=>{
  n=n.toString()
  return n[1]?n:'0'+n
}
module.exports={
  formatTime:formatTime
}
